:root {
  --red: #c40d2e;
  --red-dark: #8a0a20;
  --bg: #fafaf7;
  --ink: #111;
  --muted: #666;
  --line: #e5e5e0;
  --warn: #b35900;
  --ok: #0a8a3a;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", sans-serif;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--red); text-decoration: none; }
a:hover { color: var(--red-dark); text-decoration: underline; }

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 20px;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: #fff;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  padding-bottom: 16px;
}
.site-header nav a {
  margin-left: 16px;
  color: var(--muted);
  font-size: 14px;
}
.site-header nav a:hover { color: var(--ink); }
.brand-link { display: inline-block; }
.brand-link:hover { text-decoration: none; }
.brand {
  display: block;
  font-weight: 800;
  font-size: 22px;
  letter-spacing: -0.5px;
  color: var(--red);
}
.brand-tag {
  display: block;
  color: var(--muted);
  font-size: 12px;
  margin-top: 2px;
}

.hero { padding-top: 16px; padding-bottom: 8px; }
.hero h1 { font-size: 30px; margin: 8px 0 6px; letter-spacing: -0.8px; }
.hero-tag { color: var(--muted); font-size: 16px; margin: 0; max-width: 56ch; }

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 24px;
  margin-top: 24px;
  box-shadow: 0 1px 0 rgba(0,0,0,0.02);
}

h1, h2, h3 { letter-spacing: -0.5px; }
h2 { font-size: 20px; margin: 0 0 12px; }
h3 { font-size: 16px; margin: 24px 0 8px; }

label { display: block; font-size: 13px; color: var(--muted); margin: 16px 0 6px; }
label:first-child { margin-top: 0; }

input, select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 15px;
  background: #fff;
  font-family: inherit;
}
input:focus, select:focus {
  outline: 2px solid var(--red);
  outline-offset: -1px;
  border-color: var(--red);
}

button {
  background: var(--red);
  color: #fff;
  border: 0;
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  margin-top: 16px;
}
button:hover { background: var(--red-dark); }
button:disabled { background: #ccc; cursor: not-allowed; }
button.secondary {
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--line);
  margin-left: 8px;
}
button.secondary:hover { background: var(--bg); }

.row { display: flex; gap: 12px; align-items: flex-end; }
.row > input { flex: 1; }
.row > button { margin-top: 0; }

.pair-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 8px;
}
.pair-grid a {
  display: block;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  color: var(--ink);
  font-weight: 600;
}
.pair-grid a:hover { border-color: var(--red); text-decoration: none; }
.pair-grid a small { display: block; color: var(--muted); font-weight: 400; font-size: 12px; margin-top: 2px; }

.note { color: var(--muted); font-size: 13px; margin: 8px 0 0; }
.warn { color: var(--warn); font-weight: 600; }
.ok { color: var(--ok); font-weight: 600; }
.error { color: var(--red-dark); font-size: 13px; margin-top: 8px; }
.mono, code { font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 13px; }

.deposit-box {
  background: #fff8f9;
  border: 1px dashed var(--red);
  border-radius: 10px;
  padding: 16px;
  margin: 16px 0;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  word-break: break-all;
  font-size: 13px;
}

.steps { display: flex; gap: 4px; margin-bottom: 20px; }
.step { flex: 1; height: 4px; background: var(--line); border-radius: 2px; }
.step.active { background: var(--red); }
.step.done { background: var(--red-dark); }

.quote {
  margin: 0;
  display: grid;
  grid-template-columns: 140px 1fr;
  row-gap: 8px;
  column-gap: 16px;
}
.quote dt { color: var(--muted); font-size: 13px; }
.quote dd { margin: 0; font-weight: 500; word-break: break-all; }

.faq dt { font-weight: 600; margin-top: 12px; }
.faq dd { margin: 4px 0 0; color: var(--muted); }

.howto { padding-left: 20px; margin: 0; color: var(--muted); }
.howto li { margin-bottom: 8px; }
.howto strong { color: var(--ink); }

.tos {
  font-size: 11px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  margin-top: 48px;
  padding-top: 16px;
  padding-bottom: 32px;
}
.tos p { margin: 4px 0; }

.practice-toggle {
  color: var(--warn);
  font-weight: 600;
}
.practice-toggle:hover { color: var(--warn); text-decoration: underline; }

.practice-banner {
  background: #fff5e6;
  border-bottom: 1px solid #f0c97a;
  color: #5a3300;
  font-size: 14px;
  text-align: center;
  padding: 10px 16px;
}
.practice-banner strong { color: var(--warn); }
.practice-banner a { color: var(--warn); text-decoration: underline; }